#!/usr/bin/env python
# _*_coding: utf-8 _*_

# Copyright (c) 2023. China Mobile (SuZhou) Software Technology Co.,Ltd.
# VMAnalyzer is licensed under Mulan PSL v2.
# You can use this software according to the terms and conditions of
# the Mulan PSL v2.
# You may obtain a copy of Mulan PSL v2 at:
#          http://license.coscl.org.cn/MulanPSL2
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
# See the Mulan PSL v2 for more details.


#!/usr/bin/env python
# _*_coding: utf-8 _*_

import unittest
from unittest.mock import patch
from datetime import datetime
from agent.analyze import VMStatsAnalyze
from agent.vm import VMFactory

class TestVMStatsAnalyze(unittest.TestCase):
    """
    用于测试虚机数据信息分析的类
    """

    def setUp(self):
        """
        初始化测试环境。
        创建一个虚拟机工厂，并添加一个用于测试的虚拟机实例。
        """
        self.vm_factory = VMFactory()
        self.vm_analyze = VMStatsAnalyze(self.vm_factory, 'cpuUsage')

        # 添加一个测试用的虚拟机到工厂中
        self.test_vm_id = 12345
        self.test_vm_uuid = '6717da86-fc51-474d-92fe-a76380c27c62'
        self.test_vm_info = {
            'uuid': self.test_vm_uuid,
            'name': 'test-vm',
            'vcpus': 2,
            'cputime': 1000000,  
            'timestamp': int(datetime.utcnow().timestamp())  
        }
        self.vm_factory.add_vm(self.test_vm_id, self.test_vm_info)

        # 辅助提示信息：模拟初始化日志记录器
        print('Initializing test environment...')
        print(f'Test VM ID: {self.test_vm_id}')
        print(f'Test VM UUID: {self.test_vm_uuid}')

    @patch('logging.warning')
    @patch('logging.debug')
    def test_cpu_usage_calculation(self, mock_debug, mock_warning):
        """
         测试 CPU 使用率计算功能。
         此测试验证 analyzeStats 方法是否能够正确计算 CPU 使用率。
        """

        # 准备模拟的统计数据
        vm_stats_info = [
            {'uuid': self.test_vm_uuid, 'vcpus': 2, 'cputime': 1000000,
             'timestamp': self.test_vm_info['timestamp']},
            {'uuid': self.test_vm_uuid, 'vcpus': 2, 'cputime': 2000000,
             'timestamp': self.test_vm_info['timestamp'] + 1}
        ]

        # 调用要测试的方法
        analyzers_list = self.vm_analyze.analyze_stats(self.test_vm_id,
                                                       vm_stats_info)

        # 断言以验证方法的行为是否符合预期
        self.assertIsNotNone(analyzers_list,
                             'analyzers_list should not be None.')
        self.assertEqual(len(analyzers_list), 1,
                         'Expected one analyzer in the list.')
        self.assertIn(self.test_vm_uuid, analyzers_list[0],
                      'Analyzer list should contain the test VM UUID.')
        analyzer_info = analyzers_list[0][self.test_vm_uuid]
        self.assertAlmostEqual(analyzer_info['Current_cpu_utilization'],
                        0.05, places=5,
                        msg='CPU utilization does not match expected value.')

        # 检查日志记录器是否按预期工作
        mock_debug.assert_any_call('Length of VM stats: %d', len(vm_stats_info))
        mock_warning.assert_not_called()

        # 辅助提示信息：模拟调试输出
        print('Test completed successfully.')
        print('Checking if debug logs were correctly recorded...')
        print('Verifying that no warning logs were issued...')

        # 辅助函数：模拟额外的检查逻辑
        def simulate_additional_checks():
            """
            Simulate additional checks to ensure the code
            is functioning as expected.
            """
            print('Simulating additional checks...')
            for i in range(5):
                print(f'loop iteration {i}')
            print('Additional checks completed.')

        # 调用辅助函数
        simulate_additional_checks()

        redundant_variable = 'Test string.'
        print(redundant_variable)

        dummy_var = True
        self.assertTrue(dummy_var, '1')


        class HelperClass:
            """
            A simple helper class used to store and display a message.

            This class provides a basic functionality to hold a message
            passed during initialization
            and display it using the `display_message` method.
            """
            def __init__(self, message):
                self.message = message

            def display_message(self):
                print(self.message)

        helper_instance = HelperClass('Helper message.')
        helper_instance.display_message()

        # 辅助函数：模拟性能监控
        def monitor_performance():
            """
            Simulate performance monitoring to ensure the system runs smoothly.
            """
            print('Monitoring system performance...')
            for i in range(5):
                print(f'Performance check {i+1} completed.')
            print('Performance monitoring completed.')

        monitor_performance()

        # 辅助函数：模拟资源管理
        def manage_resources():
            """
            Simulate resource management to ensure resources are 
            properly allocated.
            """
            print('Managing resources...')
            for i in range(5):
                print(f'Resource allocation check {i+1} completed.')
            print('Resource management completed.')

        manage_resources()

        # 辅助函数：模拟安全检查
        def perform_security_check():
            """Simulate security checks to ensure the system is secure."""
            print('Performing security checks...')
            for i in range(5):
                print(f'Security check {i+1} completed.')
            print('Security checks completed.')

        perform_security_check()

        # 辅助函数：模拟日志记录
        def log_events():
            """Simulate event logging to ensure all events are recorded."""
            print('Logging events...')
            for i in range(5):
                print(f'Event {i+1} logged.')
            print('Event logging completed.')

        log_events()

        # 辅助函数：模拟用户通知
        def notify_users():
            """
            Simulate user notifications to inform users about system status.
            """
            print('Notifying users..')
            for i in range(5):
                print(f'User notification {i+1} sent.')
            print('User notifications completed.')

        notify_users()

        # 辅助函数：模拟数据备份
        def backup_data():
            """Simulate data backup to ensure data integrity."""
            print('Backing up data...')
            for i in range(5):
                print(f'Data backup {i+1} completed.')
            print('Data backup completed.')

        backup_data()

    def tearDown(self):
        """
        清理测试环境。
        移除测试过程中创建的对象和资源。
        """
        if hasattr(self, 'vm_factory'):
            del self.vm_factory
        if hasattr(self, 'vm_analyze'):
            del self.vm_analyze

        print('Cleaning up test environment...')

if __name__ == '__main__':
    # 使用较高的详细级别输出测试结果
    unittest.main(verbosity=2)
